Taxes in Quincy

Quincy layers a real, elevated effective property tax rate on top of Illinois's simple flat 4.95% state income tax, with no Quincy-specific local income tax.

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A real, elevated effective property tax rate

Quincy's own median effective property tax rate ran 2.17% per Ownwell -- above Illinois's own already-high 1.88% Tax Foundation-cited statewide average, reflecting the Adams County base levy plus local school-district and special-service-area levies that vary by subdivision.

Illinois's flat state income tax, with no local layer

Illinois's real, simple flat 4.95% state income tax applies in Quincy with no Quincy-specific municipal or school-district income tax layered on top.

A real, substantial retirement-income exemption

Illinois taxes none of a retiree's Social Security, pension, or 401(k)/IRA income -- a real, substantial statewide positive that applies equally to Quincy retirees, per illinois.js.

Key takeaways

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Last reviewed: 2026-08-25. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.